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Subversion Repositories openrisc_2011-10-31

[/] [openrisc/] [trunk/] [rtos/] [freertos-6.1.1/] [Demo/] [ARM7_STR71x_IAR/] [Library/] [uart.c] - Blame information for rev 577

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1 577 jeremybenn
/******************** (C) COPYRIGHT 2003 STMicroelectronics ********************
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* File Name          : uart.c
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* Author             : MCD Application Team
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* Date First Issued  : 06/08/2003
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* Description        : This file provides all the UART software functions
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********************************************************************************
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* History:
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*  30/11/2004 : V2.0
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*  14/07/2004 : V1.3
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*  01/01/2004 : V1.2
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*******************************************************************************
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 THE PRESENT SOFTWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS WITH
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 CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME.
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 AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT, INDIRECT
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 OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE CONTENT
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 OF SUCH SOFTWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING INFORMATION
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 CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
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*******************************************************************************/
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20
#include "uart.h"
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extern u16 UART_FlagStatus(UART_TypeDef *UARTx);
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24
/*******************************************************************************
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* Function Name  : UART_Init
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* Description    : This function initializes the selected UART.
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* Input 1        : UARTx (x can be 0,1, 2 or 3) the desired UART
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* Output         : None
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* Return         : None
30
*******************************************************************************/
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void UART_Init(UART_TypeDef *UARTx)
32
{
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  UARTx->IER = 0x00;
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  UARTx->CR = 0x00;
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  (void)UARTx->RxBUFR;
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  UARTx->RxRSTR = 0xFFFF;
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  UARTx->TxRSTR = 0xFFFF;
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}
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40
/*******************************************************************************
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* Function Name  : UART_BaudRateConfig
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* Description    : This function configures the baud rate of the selected UART.
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* Input 1        : UARTx (x can be 0,1, 2 or 3) the desired UART
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* Input 2        : The baudrate value
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* Output         : None
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* Return         : None
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*******************************************************************************/
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void UART_BaudRateConfig(UART_TypeDef *UARTx, u32 BaudRate)
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{
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  UARTx->BR = (u16)(RCCU_FrequencyValue(RCCU_FCLK)/(16*BaudRate));
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}
52
 
53
/*******************************************************************************
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* Function Name  : UART_Config
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* Description    : This function configures the baudrate, the mode, the data
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*                  parity and the number of stop bits of the selected UART.
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* Input 1        : UARTx (x can be 0,1, 2 or 3) the desired UART
58
* Input 2        : The baudrate value
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* Input 3        : The parity type
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* Input 4        : The number of stop bits
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* Input 5        : The UART mode
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* Output         : None
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* Return         : None
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*******************************************************************************/
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void UART_Config(UART_TypeDef *UARTx, u32 BaudRate, UARTParity_TypeDef Parity,
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                 UARTStopBits_TypeDef StopBits, UARTMode_TypeDef Mode)
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{
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  UART_ModeConfig(UARTx, Mode);
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  UART_BaudRateConfig(UARTx, BaudRate);
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  UART_ParityConfig(UARTx, Parity);
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  UART_StopBitsConfig(UARTx, StopBits);
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}
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74
/*******************************************************************************
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* Function Name  : UART_ItConfig
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* Description    : This function enables or disables the interrupts of the
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*                  selected UART.
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* Input 1        : UARTx (x can be 0,1, 2 or 3) the desired UART
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* Input 2        : The new interrupt flag
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* Input 3        : ENABLE or DISABLE
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* Output         : None
82
* Return         : None
83
*******************************************************************************/
84
void UART_ItConfig(UART_TypeDef *UARTx, u16 UART_Flag, FunctionalState NewState)
85
{
86
  if (NewState==ENABLE) UARTx->IER|=UART_Flag; else UARTx->IER&=~UART_Flag;
87
}
88
 
89
/*******************************************************************************
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* Function Name  : UART_FifoConfig
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* Description    : This function enables or disables the Rx and Tx FIFOs of
92
*                  the selected UART.
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* Input 1        : UARTx (x can be 0,1, 2 or 3) the desired UART
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* Input 2        : ENABLE or DISABLE
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* Output         : None
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* Return         : None
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*******************************************************************************/
98
void UART_FifoConfig(UART_TypeDef *UARTx, FunctionalState NewState)
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{
100
  if (NewState==ENABLE) UARTx->CR|=0x0400; else UARTx->CR&=~0x0400;
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}
102
 
103
/*******************************************************************************
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* Function Name  : UART_FifoReset
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* Description    : This function resets the Rx and the Tx FIFOs of the
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*                  selected UART.
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* Input 1        : UARTx (x can be 0,1, 2 or 3) the desired UART
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* Input 2        : UART_RxFIFO or UART_TxFIFO
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* Output         : None
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* Return         : None
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*******************************************************************************/
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void UART_FifoReset(UART_TypeDef *UARTx, UARTFIFO_TypeDef FIFO)
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{
114
  if (FIFO==UART_RxFIFO) UARTx->RxRSTR=0xFFFF; else UARTx->TxRSTR=0xFFFF;
115
}
116
 
117
/*******************************************************************************
118
* Function Name  : UART_LoopBackConfig
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* Description    : This function enables or disables the loop back mode of
120
*                  the selected UART.
121
* Input 1        : UARTx (x can be 0,1, 2 or 3) the desired UART
122
* Input 2        : ENABLE or DISABLE
123
* Output         : None
124
* Return         : None
125
*******************************************************************************/
126
void UART_LoopBackConfig(UART_TypeDef *UARTx, FunctionalState NewState)
127
{
128
  if (NewState==ENABLE) UARTx->CR|=0x0040; else UARTx->CR&=~0x0040;
129
}
130
 
131
/*******************************************************************************
132
* Function Name  : UART_RxConfig
133
* Description    : This function enables or disables the UART data reception.
134
* Input 1        : UARTx (x can be 0,1, 2 or 3) the desired UART
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* Input 2        : ENABLE or DISABLE
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* Output         : None
137
* Return         : None
138
*******************************************************************************/
139
void UART_RxConfig(UART_TypeDef *UARTx, FunctionalState NewState)
140
{
141
  if (NewState==ENABLE) UARTx->CR|=0x0100; else UARTx->CR&=~0x0100;
142
}
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144
/*******************************************************************************
145
* Function Name  : UART_OnOffConfig
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* Description    : This function sets On/Off the selected UART.
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* Input 1        : UARTx (x can be 0,1, 2 or 3) the desired UART
148
* Input 2        : ENABLE or DISABLE
149
* Output         : None
150
* Return         : None
151
*******************************************************************************/
152
void UART_OnOffConfig(UART_TypeDef *UARTx, FunctionalState NewState)
153
{
154
  if (NewState==ENABLE) UARTx->CR|=0x0080; else UARTx->CR&=~0x0080;
155
}
156
 
157
/*******************************************************************************
158
* Function Name  : UART_ByteSend
159
* Description    : This function sends a data byte to the selected UART.
160
* Input 1        : UARTx (x can be 0,1, 2 or 3) the desired UART
161
* Input 2        : A pointer to the data byte to send
162
* Output         : None
163
* Return         : None
164
*******************************************************************************/
165
void UART_ByteSend(UART_TypeDef *UARTx, u8 *Data)
166
{
167
  if (UARTx->CR & (0x0001<<UART_FIFOEnableBit))// if FIFO ENABLED
168
    while((UARTx->SR & UART_TxFull)); // while the UART_TxFIFO contain 16 characters.
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  else                  // if FIFO DISABLED
170
    while (!(UARTx->SR & UART_TxEmpty)); // while the transmit shift register not empty
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  UARTx->TxBUFR = *Data;
172
}
173
 
174
/*******************************************************************************
175
* Function Name  : UART_9BitByteSend
176
* Description    : This function sends a 9 bits data byte to the selected UART.
177
* Input 1        : UARTx (x can be 0,1, 2 or 3) the desired UART
178
* Input 2        : A pointer to the data to send
179
* Output         : None
180
* Return         : None
181
*******************************************************************************/
182
void UART_9BitByteSend(UART_TypeDef *UARTx, u16 *Data)
183
{
184
  if(UARTx->CR & (0x0001<<UART_FIFOEnableBit))// if FIFO ENABLED
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    while((UARTx->SR & UART_TxFull)); // while the UART_TxFIFO contain 16 characters.
186
  else                  // if FIFO DISABLED
187
    while (!(UARTx->SR & UART_TxEmpty)); // while the transmit shift register not empty
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  UARTx->TxBUFR = *Data;
189
}
190
 
191
/*******************************************************************************
192
* Function Name  : UART_DataSend
193
* Description    : This function sends several data bytes to the selected UART.
194
* Input 1        : UARTx (x can be 0,1, 2 or 3) the desired UART
195
* Input 2        : A pointer to the data to send
196
* Input 3        : The data length in bytes
197
* Output         : None
198
* Return         : None
199
*******************************************************************************/
200
void UART_DataSend(UART_TypeDef *UARTx, u8 *Data, u8 DataLength)
201
{
202
  while(DataLength--)
203
  {
204
    UART_ByteSend(UARTx,Data);
205
    Data++;
206
  }
207
}
208
 
209
/*******************************************************************************
210
* Function Name  : UART_9BitDataSend
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* Description    : This function sends several 9 bits data bytes to the selected UART.
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* Input 1        : UARTx (x can be 0,1, 2 or 3) the desired UART
213
* Input 2        : A pointer to the data to send
214
* Input 3        : The data length
215
* Output         : None
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* Return         : None
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*******************************************************************************/
218
void UART_9BitDataSend(UART_TypeDef *UARTx, u16 *Data, u8 DataLength)
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{
220
  while(DataLength--)
221
  {
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    UART_9BitByteSend(UARTx,Data);
223
    Data++;
224
  }
225
}
226
 
227
/*******************************************************************************
228
* Function Name  : UART_StringSend
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* Description    : This function sends a string to the selected UART.
230
* Input 1        : UARTx (x can be 0,1, 2 or 3) the desired UART
231
* Input 2        : A pointer to the string to send
232
* Output         : None
233
* Return         : None
234
*******************************************************************************/
235
void UART_StringSend(UART_TypeDef *UARTx, u8 *String)
236
{
237
  u8 *Data=String;
238
  while(*Data != '\0')
239
    UART_ByteSend(UARTx, Data++);
240
  *Data='\0';
241
  UART_ByteSend(UARTx, Data);
242
}
243
 
244
/*******************************************************************************
245
* Function Name  : UART_ByteReceive
246
* Description    : This function gets a data byte from the selected UART.
247
* Input 1        : UARTx (x can be 0,1, 2 or 3) the desired UART
248
* Input 2        : A pointer to the buffer where the data will be stored
249
* Input 3        : The time-out period
250
* Output         : The received data
251
* Return         : The UARTx.SR register contents
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*******************************************************************************/
253
u16 UART_ByteReceive(UART_TypeDef *UARTx, u8 *Data, u8 TimeOut)
254
{
255
   u16 wStatus;
256
   UARTx->TOR=TimeOut;// reload the Timeout counter
257
   while (!((wStatus=UARTx->SR) & (UART_TimeOutIdle|UART_RxHalfFull|UART_RxBufFull)));// while the UART_RxFIFO is empty and no Timeoutidle
258
   *Data = (u8)UARTx->RxBUFR; // then read the Receive Buffer Register
259
   return wStatus;
260
}
261
 
262
/*******************************************************************************
263
* Function Name  : UART_9BitByteReceive
264
* Description    : This function gets a 9 bits data byte from the selected UART.
265
* Input 1        : UARTx (x can be 0,1, 2 or 3) the desired UART
266
* Input 2        : A pointer to the buffer where the data will be stored
267
* Input 3        : The time-out period value
268
* Output         : The received data
269
* Return         : The UARTx.SR register contents
270
*******************************************************************************/
271
u16 UART_9BitByteReceive(UART_TypeDef *UARTx, u16 *Data, u8 TimeOut)
272
{
273
  u16 wStatus;
274
  UARTx->TOR=TimeOut;// reload the Timeout counter
275
  while (!((wStatus=UARTx->SR) & (UART_TimeOutIdle|UART_RxHalfFull|UART_RxBufFull)));// while the UART_RxFIFO is empty and no Timeoutidle
276
  *Data = (u16)UARTx->RxBUFR; // then read the RxBUFR
277
  return wStatus;
278
}
279
 
280
/*******************************************************************************
281
* Function Name  : UART_DataReceive
282
* Description    : This function gets 8 bits data bytes from the selected UART.
283
* Input 1        : UARTx (x can be 0,1, 2 or 3) the desired UART
284
* Input 2        : A pointer to the buffer where the data will be stored
285
* Input 3        : The data length
286
* Input 4        : The time-out period value
287
* Output         : The received data
288
* Return         : The UARTx.SR register contents
289
*******************************************************************************/
290
u16 UART_DataReceive(UART_TypeDef *UARTx, u8 *Data, u8 DataLength, u8 TimeOut)
291
{
292
  u16 wStatus;
293
  while(DataLength--)
294
    wStatus=UART_ByteReceive(UARTx,Data++,TimeOut);
295
  return wStatus;
296
}
297
 
298
/*******************************************************************************
299
* Function Name  : UART_9BitDataReceive
300
* Description    : This function gets 9 bits data bytes from the selected UART.
301
* Input 1        : UARTx (x can be 0,1, 2 or 3) the desired UART
302
* Input 2        : A pointer to the buffer where the data will be stored
303
* Input 3        : The data length
304
* Input 4        : The time-out value
305
* Output         : The received data
306
* Return         : The UARTx.SR register contents
307
*******************************************************************************/
308
u16 UART_9BitDataReceive(UART_TypeDef *UARTx, u16 *Data, u8 DataLength, u8 TimeOut)
309
{
310
  u16 wStatus;
311
  while(DataLength--)
312
    wStatus=UART_9BitByteReceive(UARTx,Data++,TimeOut);
313
  return wStatus;
314
}
315
 
316
/*******************************************************************************
317
* Function Name  : UART_StringReceive
318
* Description    : This function gets 8 bits data bytes from the selected UART.
319
* Input 1        : UARTx (x can be 0,1, 2 or 3) the desired UART
320
* Input 2        : A pointer to the buffer where the string will be stored
321
* Output         : The received string
322
* Return         : The UARTx.SR register contents
323
*******************************************************************************/
324
u16 UART_StringReceive(UART_TypeDef *UARTx, u8 *Data)
325
{
326
  u8 *pSTRING=Data;
327
  u16 wStatus;
328
  do
329
  {
330
    while (!((wStatus=UARTx->SR) & (UART_RxHalfFull|UART_RxBufFull)));// while the UART_RxFIFO is empty and no Timeoutidle
331
    *(pSTRING++) = (u8)UARTx->RxBUFR; // then read the RxBUFR
332
  } while((*(pSTRING - 1)!=0x0D)&(*(pSTRING - 1)!='\0'));
333
  *(pSTRING - 1)='\0';
334
  return wStatus;
335
}
336
 
337
#ifdef USE_SERIAL_PORT
338
/*******************************************************************************
339
* Function Name  : sendchar
340
* Description    : This function sends a character to the selected UART.
341
* Input 1        : A pointer to the character to send.
342
* Output         : None
343
* Return         : None
344
*******************************************************************************/
345
void sendchar( char *ch )
346
{
347
   #ifdef USE_UART0
348
     #define  UARTx  UART0
349
   #endif /* Use_UART0 */
350
 
351
   #ifdef USE_UART1
352
     #define  UARTx  UART1
353
   #endif /* Use_UART1 */
354
 
355
   #ifdef USE_UART2
356
     #define  UARTx  UART2
357
   #endif /* Use_UART2 */
358
 
359
   #ifdef USE_UART3
360
     #define  UARTx  UART3
361
   #endif /* Use_UART3 */
362
 
363
   UART_ByteSend(UARTx,(u8 *)ch);
364
}
365
#endif /* USE_SERIAL_PORT */
366
 
367
/******************* (C) COPYRIGHT 2003 STMicroelectronics *****END OF FILE****/

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